Oscillating suction box



W. P. MUIR Nov. 28, 1933.

OSCILLATING SUCTION BOX Filed Oct. 21. 1931 3 Sheets-Sheet 1 am Y mm m m m m n i 1 L i M W V A m J Q m M M M \2 3 2 n u I- u n (K/ m: 3 m m 3; Q 2 J u K 5 0 Nov. 28, 1933.

W. P. MUIR OSCILLATING SUCTION BOX Filed Oct. 21. 1931 3 Sheets-Sheet 2 mm vm 3m mm R R% H r H V I N a m m m 1 P A E T mm mm m\ Mm fin /M w? V M T 4 mm? A @m Q E Q m: w an x Q NV I mm r J L m @E Qv wwwm wn 3 mm W v 5 ow wm w wm v E mfim d w H mwq @m mm 2 mm 2 I: I 3: a F: Q mum mm mm m awn Ow an 3 awn mm hm. mm

NOV. 28, 1933. w p MU|R 1,937,478

OSCILLATING SUCTION BOX Filed Oct. 21. 1931 3 Sheets-Sheet 3 I i L r FIG 4 LI I lNVENTUlt WILLIAM]? MUIR ATTORNEY rangement eliminatesthe continuous or'circular path about arrangement provided for this purpose being with this arrangement, I

provide an automatic "reversing motor since the continuous or circular movement of the ends of Patented Nov. 28, 1933 OSCILLATING suo'rlon Box William 'P. Muir, MontrealQQuebec, Canada, :assignor to DominionEngineering'Works Limited,

Montreal,

Canada Application October 21, 1931.

Quebec, Canada, a corporation of 17 Claims. (01 92-51) This invention relates to a suction box assemblyfor 'Fourdrinier machines and particularly to an assembly in which the boxes are moved back and forth across thesheet forming wire at a coni tinuously changing angle.

"Theprincipal object is to provide an assembly in which the desired movement of the boxes is accomplished without imposing appreciable reversal shocks on the box supporting and operating means and one in which the frictional resistances, tendingto' oppose movement of the boxes, are reduced to a minimum.

The salient feature of this invention resides in moving each endof the individual boxes in a a fixed axis, the

characterized in that each end of'the box has a unidirectional movement about its own axis which is preferably opposite to the unidirectional movement of the companion end so that the box,

as awholeyis moved back and forth across the wire-at a continuously changing angle. This arimposition ofreversal shocks on the-box supporting and operating meanssince the change in the direction of movements of the boxes with respect to the wire is accomplished'without' changing the direction of movement initiallyimparted to. the ends of the boxes by the'operating means. Consequently,

' it is not necessary to the 'boxes'about'fixed axes enables the desired movement" to be imparted to all of the boxes throughthe medium of, a umdirectional'drive shaft; A further advantage of the described arrangemnt is that'it' facilitates the reduction of frictionaljresistances opposing the movement of the 'boxes an'd enables such movement to be effected witha minimum expenditure of power.

'Ihe'actuationbf the boxes so Lthateach end moves about itspwnaxis in: a" direction opposite to'that of the companion end is'important, in that. it provides for a continuous and substantial 4 change'in the angulariposition'of the boxes with reference'tothe wire duri g the back and forth movement. It"is,however, considered within the scopepf this invention to arrange theboxes' so that'eachend moves in the same direetior as the companion end. [All of the'boxes maybe simul-' taneously moved in the'same direction or' the arrangement may be such that each'box is moved ifi a directionopposite to certain of the-remainin gboxes. The last arrangement is particularly desirable since the opposed movements of "the v and is supported.

boxes tends to prevent lateral displacement-of the'wire' 1 Proceeding now to -"a imore detailed discussion oflthe .inventionreference will be had touthecac companyingrdrawings, wherein- Figure 1*is: aside view partlyin section of a suction box assembly provided in accordance with this invention. I

Figure2 is a transverse sectional '.view taken:

alongthe line 2-e2 of.:Fig..1.

Figure'3 is an enlarged-sectional:view'through one of the suction boxsupports, said-viewbeing.

taken substantially along the. line *33:0f Figs-2. Figure 4 is a side'viewsimlar to Fig. lrbut lookingtowards the oppositesidetofthe assembly.

- Referring more, particularly to :the drawings,- 11 I designates :a: series of suction boxes equipped, with the usual, perforatedlcovers 11a. -Eachjbox' is carried. by :a painoisuppo'rting pins 12 having their lower extremities attached to opposite and 2 portionsof the cover 'llaiby means of plates 14, eachplate being provided with -:a 3, pin receiving opening 15 anda recess 16,4116 latter'reoeiving: an *enlarged head 12a formed.- -at the, lower; end" of .the pin. 'The pins are movement in the openings'lfiand the 'plates r14 are rigidly fastened to the-box cover 11min. any suitable manner. 'Each pin 12 is rotatably mount- .ed in a supporting sleevel'l which'is eccentrically" apertured' to provide the spin receiving bore r18;-

held against turning The upper'end ofttheixpin projectsabove thesleeve therefromby meapsof an interposed anti-friction bearing comprising an! inner race 19, an outer race 2,0rand a series of in-'.

tervening'rollers 21. The inner' race 19 isinthe form et a tapered cone surrounding the upper portion :of "the'pin beneath the retaining washer 22; and'the'nut 23. The'outer; race 20; i s-in the form of a ring having its innerface, ,tapered to conform .to'the taper of mounted in a "recessed annulus 24* suitably secured totheupper endof the 'sleeveil'l. nt the lower end of the sleeve the pin receiving bore 1 8 isenlarged to provide a recess receiving the bushing 25 andsuitable packing- 26. v'Above the bushing 25 therbore 18 :and: the: pin 12 are preferably formed with complementary tapering v =port-ions 18a and12a respectively. 3 I r Eachsleeve '17 is mounted to revolve in t -one supporting annulus '24, said cone 'or ball'race 31 prising an inner race 38, an outer '28, said top portion 28a porting a gear-37 surrounding a reduced portion of the sleeveand resting on a shoulder 32. A series of anti-friction rollers 33 are interposed between the inner race '31 and an outer race fitted inan opening defined bythe depending flange 34a of a circular plate 34b. The plate 34b carries a dome shaped cover 35 enclosing the upper ends of the sleeve 17 and pin 12 and is mounted on the removable top portion 28a of thecasing beingformed with an opening 28?; receiving the flange 34a. At some distance from its lower end the-sleeve 17 is formed with. an outwardly projecting shoulder36 sup- The sleeve is bearing comrace 39 and a series of anti-friction rollers 40. The inner race 38is in the form of a' tapered cone surrounding the lower portion of the sleeve and fitting'against the lowersurface of the shoulder36. The outer race 39 is in the form of a ring having its inner surface tapered to conform to the taper of the rollers 38. This outer race or ring 39 is mounted fixed to the body of the sleeve. supported at its lower end by a ball in a depending circular portion 28c of the casing 28 and is supported on the upper edge of a ring shaped member 41. The outer periphery of the ring 41 is stepped to provide a shoulder 42 en- 7 gaging a complementary supporting. shoulder 43 formed at the lower'end. of the casing portion 28c.- Theinner periphery of the ring 41 isalso stepped tov provide a supporting shoulder 44 on which is arranged a suitable packing 45 interposed between saidring shaped members and the adjacent surfaceof the sleevea-The series of sleeves 17 supported by eachcasing 28 is arranged there-.

use

. end of'a' '48, A bevelgearor pinion 49 is fixed" to the lowerend of each shaft 47 in mesh with complementary bevel gears or-pins' 50.fixed to a ing' members 55 mounted in in so that the gear 37 -of Teach sleevemeshes directly with the gears of the adjacentsleeve. A

drive gear 46 is mounted in one end of each casing 28' andmeshes' with the gear 37 of the adjacent sleeve 17. Eachdrive gear 46 is fixed to the upper vertical shaft '47 mounted in suitable bearings cross'sha'ft 51. In the present instance the cross shaft5l is shown as consisting of ahollow tube 52-having short solid shaft sections 53 fitted in each of its opposite ends.

tions 54 projecting beyond-the ends of thetube 52 and carrying the gears or pinions. 50, said trunnions54 being journalled in: suitable bearthe side frames 30. One of the trunnions 54 is projected outwardly beyond the supporting side frame 30 and is coupled to the drive shaft 56 of a motor 57through the medium ,of suitable reduction gearing .58.}

The motor57 and the casing of the-reduction gear 58 are' herein shown as carried by suitable brackets 59- and GOfastened to the side frame '30.

Shaft 51 is preferably enclosed by a tubular casing 51a extending between the side frames 30.

Eromtheforegoing it will bemanifest that whenthe motor 5'7 is energized it serves to rotate each of thepin supporting sleeves 17 through he-medium' of the cross shaft-.51, gears 50and 49,'shafts l7 and gears afi and 3'7.. With the particular form o f gearing described herein the direction'of rotation imparted to each sleeve is opposite "to that of the adjacent .sleeve in the same series' During rotation of each sleeve the pin.mounted=therein is obviously caused to move in a circular path about a fixed center coinciding with the central longitudinal axis of the sleeve.

34, the latter being a very desirable manner.

cent box with the result that the which is keyed or otherwise 7 V men'ts of the'boxes tend to offset any tendency same direction of movement to beimparte d to --Thesei shaft sections, 53' areformedto present reduced trunnion porner preventing angular Hence, as regardsthe two pinssupporting the opposite ends of each box, it will be manifest that each pin has a unidirectional movement about its own axis which is opposite to the unidirectional movement of the companion pin. During this'movement of the pins each box is caused to, moveback and forth across the sheet forming wire (not shown) at a continuously changin angle so, that the wear on the engaging surfaces of the wire and boxes is distributed in The direction of movementimparted to each box is at all times opposite to the direction of movement of the adjaopposed move- I wire.

Having thusfully described what I now consider to be a preferred embodiment of the invention, it will be understood that various modifications may be resorted to. For example,.in place of the particular gearing herein described it is possible to employ various other-types of gearing and. to arrange the same so that the supporting pins associated with-each box are" moved in the same direction instead of being moved in opposite directions aspreviouslydescribed. V Itis also possible to employ a formand arrangement of gearing .whichwill cause the all of the boxes simultaneously although. it,.is preferred that each box be moved in a direction opposite to certain of the remaining boxes. The foregoing and various other modifications which will obviously suggest themselves from a knowl} edge of the present invention are considered Tto fall within the scope and spirit of the appended claims.

Having thus claim-is: 1

1. In a paper making machine the 'combinae,

described my invention, whatI tion of a suction box and meansrfor moving the box back and forth acrossthe wire at a continuously changing angle with respect to said wife, said means serving to move eachlend of the box in a continuous path about'a'fixed axis. l 2. A suction box mounting for paper making machines comprising a pair ofsuppoi'ting mem bers attached to the ,ends'of the box and'means for moving each member in an endless path about; a fixed axis. f f 1 .3. .A suction box mounting for. paper making. machines comprising a pair of 'supportingmemi bers attached to the ends of the box and means.

for moving each member infanendle'ss path about a fixed axis and in a direction opposite to the-movement of the companion member.

.4. A suction box mounting forpaper making machines comprising a pair .of supporting'members, means attaching said membersto the ends 1 of the box so asito prevent angular movement of the boxv with respect to said members and means for moving each member in an endless path'about a fixed axis- 5. A suction box.mountingforpapermaking 1- machines comprising a pair of supporting mem bers attached to the ends of the box in a inan movement of the box with respect thereto, and means for movingeach member in an endless path about a fixed axis and'in a direction opposite to the movementof the companion member. I

6. The combination with a suction b'o'x'jror paper making machines of meansfor. moving eachend of'the box ina circular path about a fixed axis and in a direction opposite to the direction of movement imparted to the companion end so that the box, as a whole, is moved back and forth across the sheet forming wire at a continuously changing angle with respect to said wire. e

'7. A suction box assembly for Fourdrinier paper making machines comprising a series of suction boxes positioned beneath the sheet forming wire and means for moving the suction box back and forth across the wire at a continuously changing angle with respect to said wire, the direction of movement imparted to each box being opposite to that imparted to other boxes of the series.

8. A suction box assembly for Fourdrinier paper making machines comprising a series of suction boxes positioned beneath the sheet forming wire and means for moving the suction box back and forth across the wire at a continuously changing angle with respect to said wire, the direction of movement imparted to each box being opposite to that imparted to other boxes of the series, said means interconnecting all of said boxes for simultaneous actuation. o

9. A suction box assembly for Fourdrinier paper making machines comprising a series of suction boxes, a pair of supporting members attached to the ends of each box, each member 'being mounted for movement in an endless path about a fixed axis and operating means for so moving said members, the arrangement being characterized by the fact that the supporting members of the various boxes are interconnected by the operating means so as to be simultaneously actuated thereby.

10. A suction box assembly for paper making machines comprising a series of suction boxes, a pair of supporting members attached to the ends of each box, each supporting member being movable in a continuous path about a fixed axis in a direction opposite to the movement of the companion member and also opposite to the direction of 'movement of the corresponding supporting members of adjacent boxes and means for so moving said members.

11. A suction box assembly for Fourdrinier paper making machines comprising a series of suction boxes and means for simultaneously moving all of said boxes back and forth across the sheet forming wire at a continuously changing angle with respect to said wire, said means being characterized in that the opposite ends of each box are each moved in a continuous path about a fixed axis in a direction opposite to the direction of movement imparted to the companion end and also opposite to the direction of movement imparted to the corresponding ends of other boxes of the series. I

12. A suction box mounting comprising a pair of supporting pins attached tothe ends of the box, a'pair of rotatably mounted sleeves eccentrically apertured to provide pin receiving bores in which said pins are mounted and means for rotating said sleeves.

13. A suction boxmou ting comprising a pair of supporting pins attached tothe ends'of the box, a pair of sleeveseccentrically aperturedto provide pin receiving bores in which said pins are rotatably mounted and means for rotating said sleeves. I

14. A suction box no unting comprising a pair of supporting pins attached to the ends of the box, a pair of rotatably mounted sleeves eccentrically apertured to provide pin receiving bores in which said pins are mounted to rotate, antifriction bearings supporting the pins in said bores, and means for rotating said sleeves.

15. A suction box mounting comprising a pair of supporting pins attached to the ends of the box, a pair of sleeves eccentrically' apertured to provide pin receiving bores in which said pins are mounted and means for rotating said sleeves in opposite directions.

16. A suction box assembly for Fourdrinier paper making machines comprlsing a series of suction boxes positioned beneath the sheet forming wire, a pair of supporting pins attached to the ends or each box, a rotatably mounted sleeve associated with each pin, said sleeve being eccentrically apertured to provide a pin receiving bore in which the pin is mounted and means for simultaneously rotating all of said sleeves.

1'7. A suction box assembly for Fourdrinier paper making machines comprising a series of suction boxes positioned beneath the sheet forming wire, a pair ofsupporting pins attached to opposite ends of each box, a, sleeve associated with each pin, said sleeve being 'eccentrically apertured to provide a I which the pin is mounted and means for simultaneously rotating all of said sleeves including provision for causing the companion sleeves associated with each box-to rotate in opposite direction with respect to one another.

,WILLIAM P. MUIR.

12G pin receiving bore in 

